The Siemens SIRIUS 3RS7006-2FE00 is a universal signal converter, one channel, designed to accept a wide range of analog inputs — from 0...60 mV up to 0...20 V, and current loops including 4...20 mA, 0...20 mA, and ±20 mA. It's an active, switchable design, meaning you can configure it for the signal type you're dealing with in the field. That single channel handles one process variable at a time, so for a multi-loop skid you'd stack them — each one takes up 17.5 mm of DIN rail, which is a standard single-module slice. It's part of the SIRIUS family, Siemens' industrial-control component line for panel building.
The input voltage rating is 30 V AC/DC, and the converter draws only 0.5 W of active power. That low draw means you can power it from a small 24 V supply without worrying about the heat budget in a crowded enclosure — 0.5 W is negligible for a panel with a few relays and a PLC. The 20 mV maximum voltage ripple on the supply tells you this converter is sensitive to a clean DC rail; if your 24 V bus has a noisy VFD on it, you'll want to check the ripple before blaming the signal converter for a drifting 4-20 mA loop. Galvanic isolation between input and output is present, which is the main reason you'd reach for this box over a simple resistor shunt. That isolation breaks ground loops between the field transmitter and the PLC analog input card — a common source of offset error in long cable runs. No isolation between the two inputs (there's only one channel) or between the two outputs, so don't expect channel-to-channel separation on a multi-unit install. The rise time is 6 ms, and the limit frequency is 30 Hz. That's fine for a temperature or pressure trend, but too slow for a fast-acting flow or vibration signal. If you're converting a 4-20 mA from a magnetic flowmeter with a 100 Hz output, this converter will low-pass it — you'll lose the peaks. The 30 Hz limit is the bandwidth of the converter itself, not the input signal's carrier.
The 17.5 mm width is the standard single-module footprint — one slot in a SIRIUS or SENTRON distribution block row. Clearances are zero all around — 0 mm upwards, downwards, forwards, backwards, and to the side — meaning you can butt it against the next component without derating for heat or creepage. Wiring is via screw terminals accepting 20...14 AWG solid or stranded, one conductor per clamp. The IP20 protection class means it's for use inside a closed panel only — no washdown, no dust. If you need to mount it in a field enclosure that sees condensation, you'll want a cover or a higher-rated enclosure around it.